[CAUT] Baldwin SD

[Fred Sturm]

Thanks, Ron. That's very helpful. The cumulative loss of compression  
would be due to repeated cycling of high to low humidity, yes?  
Resulting in crushed wood fiber structure?
	I'll start examining pianos with a little more care and attention.  
Partly it's a question of knowing precisely what to be looking at and  
listening for. And having the tools to measure.
	BTW, I recently constructed a home made version of the Lowell gauge  
(when I finally decided to spring for one a few years ago, it had  
become unavailable). I'll post pictures for those interested.
Regards,
Fred Sturm
University of New Mexico
fssturm at unm.edu



On Apr 3, 2006, at 11:58 AM, Ron Nossaman wrote:
>     Is it a matter of "stiffness" (which can mean DB, spongy wood,  
> lack of firm support from rim, a few scenarios)?

Stiffness. Cumulative loss of compression in the panel letting the  
assembly become too flexible. Sometimes, adding mass can compensate  
to some degree (up to a point), but the lack of stiffness that caused  
the problem the weight lessened, is still there.
<snip>
> How many nasty sounding killer octaves have you found that had both  
> positive crown and positive bearing at the point in the scale where  
> the problem is? For that matter, how many times have you checked KO  
> bearing and crown when you hear the attack distortion there,  
> looking for some relationship between the three?
>
> Ron N

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